1 /* $NetBSD: fb_elb.c,v 1.14 2020/11/21 15:42:20 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Juergen Hannken-Illjes. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: fb_elb.c,v 1.14 2020/11/21 15:42:20 thorpej Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/conf.h> 37 #include <sys/device.h> 38 #include <sys/ioctl.h> 39 #include <sys/kmem.h> 40 #include <sys/systm.h> 41 42 #include <dev/wscons/wsconsio.h> 43 #include <dev/wscons/wsdisplayvar.h> 44 #include <dev/rasops/rasops.h> 45 46 #include <machine/explora.h> 47 #include <sys/bus.h> 48 49 #include <evbppc/explora/dev/elbvar.h> 50 51 #define FB_NPORTS 65536 52 53 struct fb_dev { 54 void *fb_vram; 55 bus_space_tag_t fb_iot; 56 bus_space_handle_t fb_ioh; 57 struct rasops_info fb_ri; 58 }; 59 60 struct fb_elb_softc { 61 device_t sc_dev; 62 struct fb_dev *sc_fb; 63 int sc_nscreens; 64 }; 65 66 static int fb_elb_probe(device_t, cfdata_t, void *); 67 static void fb_elb_attach(device_t, device_t, void *); 68 void fb_cnattach(bus_space_tag_t, bus_addr_t, void *); 69 static void fb_init(struct fb_dev *, int); 70 static int fb_ioctl(void *, void *, u_long, void *, int, struct lwp *); 71 static paddr_t fb_mmap(void *, void *, off_t, int); 72 static int fb_alloc_screen(void *, const struct wsscreen_descr *, void **, 73 int *, int *, long *); 74 static void fb_free_screen(void *, void *); 75 static int fb_show_screen(void *, void *, int, void (*)(void *, int, int), 76 void *); 77 78 static void fb_eraserows(void *, int, int, long); 79 static void fb_erasecols(void *, int, int, int, long); 80 static void fb_copyrows(void *, int, int, int); 81 static void fb_copycols(void *, int, int, int, int); 82 83 static void s3_init(struct fb_dev *, int *, int *); 84 static void s3_copy(struct fb_dev *, int, int, int, int, int, int, int); 85 static void s3_fill(struct fb_dev *, int, int, int, int, int, int); 86 87 static struct fb_dev console_dev; 88 89 static struct wsdisplay_accessops accessops = { 90 fb_ioctl, 91 fb_mmap, 92 fb_alloc_screen, 93 fb_free_screen, 94 fb_show_screen, 95 NULL 96 }; 97 98 static struct wsscreen_descr stdscreen = { 99 "std", 100 0, 0, 101 0, 102 0, 0, 103 0 104 }; 105 106 static const struct wsscreen_descr *scrlist[] = { 107 &stdscreen 108 }; 109 110 static struct wsscreen_list screenlist = { 111 __arraycount(scrlist), scrlist 112 }; 113 114 CFATTACH_DECL_NEW(fb_elb, sizeof(struct fb_elb_softc), 115 fb_elb_probe, fb_elb_attach, NULL, NULL); 116 117 static int 118 fb_elb_probe(device_t parent, cfdata_t cf, void *aux) 119 { 120 struct elb_attach_args *oaa = aux; 121 122 if (strcmp(oaa->elb_name, cf->cf_name) != 0) 123 return 0; 124 125 return (1); 126 } 127 128 static void 129 fb_elb_attach(device_t parent, device_t self, void *aux) 130 { 131 struct fb_elb_softc *sc = device_private(self); 132 struct elb_attach_args *eaa = aux; 133 struct wsemuldisplaydev_attach_args waa; 134 struct rasops_info *ri; 135 bus_space_handle_t ioh; 136 int is_console; 137 138 sc->sc_dev = self; 139 140 is_console = ((void *)eaa->elb_base == console_dev.fb_vram); 141 142 if (is_console) { 143 sc->sc_fb = &console_dev; 144 sc->sc_fb->fb_ri.ri_flg &= ~RI_NO_AUTO; 145 } else { 146 sc->sc_fb = kmem_zalloc(sizeof(struct fb_dev), KM_SLEEP); 147 } 148 149 sc->sc_fb->fb_iot = eaa->elb_bt; 150 bus_space_map(sc->sc_fb->fb_iot, eaa->elb_base, SIZE_FB, 151 BUS_SPACE_MAP_LINEAR, &ioh); 152 sc->sc_fb->fb_vram = bus_space_vaddr(sc->sc_fb->fb_iot, ioh); 153 bus_space_map(sc->sc_fb->fb_iot, eaa->elb_base2, FB_NPORTS, 154 0, &sc->sc_fb->fb_ioh); 155 156 fb_init(sc->sc_fb, !is_console); 157 158 ri = &sc->sc_fb->fb_ri; 159 160 printf(": %d x %d\n", ri->ri_rows, ri->ri_cols); 161 162 waa.console = is_console; 163 waa.scrdata = &screenlist; 164 waa.accessops = &accessops; 165 waa.accesscookie = sc; 166 167 config_found(self, &waa, wsemuldisplaydevprint); 168 } 169 170 static void 171 fb_init(struct fb_dev *fb, int full) 172 { 173 struct rasops_info *ri = &fb->fb_ri; 174 175 if (full) { 176 s3_init(fb, &ri->ri_width, &ri->ri_height); 177 ri->ri_depth = 8; 178 ri->ri_stride = ri->ri_width; 179 ri->ri_bits = fb->fb_vram; 180 ri->ri_flg = RI_CENTER; 181 if (ri == &console_dev.fb_ri) 182 ri->ri_flg |= RI_NO_AUTO; 183 184 rasops_init(ri, 500, 500); 185 } else { 186 ri->ri_origbits = fb->fb_vram; /*XXX*/ 187 rasops_reconfig(ri, 500, 500); 188 } 189 190 /* Replace the copy/erase ops. */ 191 ri->ri_hw = fb; 192 ri->ri_ops.eraserows = fb_eraserows; 193 ri->ri_ops.erasecols = fb_erasecols; 194 ri->ri_ops.copyrows = fb_copyrows; 195 ri->ri_ops.copycols = fb_copycols; 196 197 stdscreen.nrows = ri->ri_rows; 198 stdscreen.ncols = ri->ri_cols; 199 stdscreen.textops = &ri->ri_ops; 200 stdscreen.capabilities = ri->ri_caps; 201 } 202 203 static int 204 fb_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, struct lwp *l) 205 { 206 struct fb_elb_softc *sc = v; 207 struct rasops_info *ri = &sc->sc_fb->fb_ri; 208 struct wsdisplay_fbinfo *wdf; 209 210 switch (cmd) { 211 case WSDISPLAYIO_GTYPE: 212 *(int *)data = WSDISPLAY_TYPE_UNKNOWN; /* XXX */ 213 return(0); 214 215 case WSDISPLAYIO_GINFO: 216 wdf = (void *)data; 217 wdf->height = ri->ri_height; 218 wdf->width = ri->ri_width; 219 wdf->depth = ri->ri_depth; 220 wdf->cmsize = 16; /*XXX*/ 221 return(0); 222 223 case WSDISPLAYIO_SVIDEO: 224 case WSDISPLAYIO_GETCMAP: 225 case WSDISPLAYIO_PUTCMAP: 226 break; 227 } 228 229 return(EPASSTHROUGH); 230 } 231 232 static paddr_t 233 fb_mmap(void *v, void *vs, off_t offset, int prot) 234 { 235 struct fb_elb_softc *sc = v; 236 237 if (offset < 0 || offset >= SIZE_FB) 238 return -1; 239 240 return bus_space_mmap(sc->sc_fb->fb_iot, BASE_FB, offset, prot, 241 BUS_SPACE_MAP_LINEAR); 242 } 243 244 static int 245 fb_alloc_screen(void *v, const struct wsscreen_descr *scrdesc, void **cookiep, 246 int *ccolp, int *crowp, long *attrp) 247 { 248 struct fb_elb_softc *sc = v; 249 struct rasops_info *ri = &sc->sc_fb->fb_ri; 250 251 if (sc->sc_nscreens > 0) 252 return ENOMEM; 253 254 *cookiep = ri; 255 *ccolp = *crowp = 0; 256 (*ri->ri_ops.allocattr)(ri, 0, 0, 0, attrp); 257 sc->sc_nscreens++; 258 259 return(0); 260 } 261 262 static void 263 fb_free_screen(void *v, void *cookie) 264 { 265 struct fb_elb_softc *sc = v; 266 267 if (sc->sc_fb == &console_dev) 268 panic("fb_free_screen: freeing console"); 269 270 sc->sc_nscreens--; 271 } 272 273 static int 274 fb_show_screen(void *v, void *cookie, int waitok, void (*cb)(void *, int, int), 275 void *cbarg) 276 { 277 return(0); 278 } 279 280 void 281 fb_cnattach(bus_space_tag_t iot, bus_addr_t iobase, void *vram) 282 { 283 struct rasops_info *ri = &console_dev.fb_ri; 284 long defattr; 285 286 console_dev.fb_iot = iot; 287 console_dev.fb_ioh = iobase; 288 console_dev.fb_vram = vram; 289 290 fb_init(&console_dev, 1); 291 292 (*ri->ri_ops.allocattr)(ri, 0, 0, 0, &defattr); 293 294 wsdisplay_cnattach(&stdscreen, ri, 0, 0, defattr); 295 } 296 297 static void 298 fb_eraserows(void *v, int row, int nrows, long attr) 299 { 300 struct rasops_info *ri = v; 301 struct fb_dev *fb = ri->ri_hw; 302 303 row *= ri->ri_font->fontheight; 304 nrows *= ri->ri_font->fontheight; 305 306 s3_fill(fb, 0, row, ri->ri_stride, nrows, (attr >> 16)&0x0f, 0x0f); 307 } 308 309 static void 310 fb_erasecols(void *v, int row, int startcol, int ncols, long attr) 311 { 312 struct rasops_info *ri = v; 313 struct fb_dev *fb = ri->ri_hw; 314 315 row *= ri->ri_font->fontheight; 316 startcol *= ri->ri_font->fontwidth; 317 ncols *= ri->ri_font->fontwidth; 318 319 s3_fill(fb, startcol, row, ncols, ri->ri_font->fontheight, 320 (attr >> 16)&0x0f, 0x0f); 321 } 322 323 static void 324 fb_copyrows(void *v, int srcrow, int dstrow, int nrows) 325 { 326 struct rasops_info *ri = v; 327 struct fb_dev *fb = ri->ri_hw; 328 329 srcrow *= ri->ri_font->fontheight; 330 dstrow *= ri->ri_font->fontheight; 331 nrows *= ri->ri_font->fontheight; 332 333 s3_copy(fb, 0, srcrow, 0, dstrow, ri->ri_stride, nrows, 0x0f); 334 } 335 336 static void 337 fb_copycols(void *v, int row, int srccol, int dstcol, int ncols) 338 { 339 struct rasops_info *ri = v; 340 struct fb_dev *fb = ri->ri_hw; 341 342 row *= ri->ri_font->fontheight; 343 srccol *= ri->ri_font->fontwidth; 344 dstcol *= ri->ri_font->fontwidth; 345 ncols *= ri->ri_font->fontwidth; 346 347 s3_copy(fb, srccol, row, dstcol, row, 348 ncols, ri->ri_font->fontheight, 0x0f); 349 } 350 351 /* 352 * S3 support routines 353 */ 354 355 #define S3_CRTC_INDEX 0x83d4 356 #define S3_CRTC_DATA 0x83d5 357 358 #define S3_DAC_RD_INDEX 0x83c7 359 #define S3_DAC_WR_INDEX 0x83c8 360 #define S3_DAC_DATA 0x83c9 361 362 #define S3_CUR_Y 0x82e8 363 #define S3_CUR_X 0x86e8 364 #define S3_DESTY_AXSTP 0x8ae8 365 #define S3_DESTX_DIASTP 0x8ee8 366 #define S3_MAJ_AXIS_PCNT 0x96e8 367 #define S3_GP_STAT 0x9ae8 368 #define S3_CMD 0x9ae8 369 #define S3_BKGD_COLOR 0xa2e8 370 #define S3_FRGD_COLOR 0xa6e8 371 #define S3_WRT_MASK 0xaae8 372 #define S3_RD_MASK 0xaee8 373 #define S3_BKGD_MIX 0xb6e8 374 #define S3_FRGD_MIX 0xbae8 375 #define S3_MULTIFUNC_CNTL 0xbee8 376 377 #define S3_GP_STAT_FIFO_1 0x0080 378 #define S3_GP_STAT_BSY 0x0200 379 380 #define S3_CMD_BITBLT 0xc001 381 #define S3_CMD_RECT 0x4001 382 #define S3_INC_Y 0x0080 383 #define S3_INC_X 0x0020 384 #define S3_DRAW 0x0010 385 #define S3_MULTI 0x0002 386 387 #define S3_CSRC_BKGDCOL 0x0000 388 #define S3_CSRC_FRGDCOL 0x0020 389 #define S3_CSRC_DISPMEM 0x0060 390 #define S3_MIX_NEW 0x0007 391 392 #define CMAP_SIZE 256 393 394 static u_int8_t default_cmap[] = { 395 /* black */ 0, 0, 0, 396 /* blue */ 0, 0, 192, 397 /* green */ 0, 192, 0, 398 /* cyan */ 0, 192, 192, 399 /* red */ 192, 0, 0, 400 /* magenta */ 192, 0, 192, 401 /* brown */ 192, 192, 0, 402 /* lightgrey */ 212, 208, 200, 403 /* darkgrey */ 200, 192, 188, 404 /* lightblue */ 0, 0, 255, 405 /* lightgreen */ 0, 255, 0, 406 /* lightcyan */ 0, 255, 255, 407 /* lightred */ 255, 0, 0, 408 /* lightmagenta */ 255, 0, 255, 409 /* yellow */ 255, 255, 0, 410 /* white */ 255, 255, 255, 411 }; 412 413 static void 414 s3_init(struct fb_dev *fb, int *width, int *height) 415 { 416 int i, j, w, h; 417 bus_space_tag_t iot = fb->fb_iot; 418 bus_space_handle_t ioh = fb->fb_ioh; 419 420 /* Initialize colormap */ 421 422 bus_space_write_1(iot, ioh, S3_DAC_WR_INDEX, 0); 423 424 for (i = j = 0; i < CMAP_SIZE*3; i++) { 425 bus_space_write_1(iot, ioh, S3_DAC_DATA, default_cmap[j] >> 2); 426 j = (j+1) % sizeof(default_cmap)/sizeof(default_cmap[0]); 427 } 428 429 /* Retrieve frame buffer geometry */ 430 431 bus_space_write_1(iot, ioh, S3_CRTC_INDEX, 1); 432 w = bus_space_read_1(iot, ioh, S3_CRTC_DATA); 433 434 bus_space_write_1(iot, ioh, S3_CRTC_INDEX, 18); 435 h = bus_space_read_1(iot, ioh, S3_CRTC_DATA); 436 437 bus_space_write_1(iot, ioh, S3_CRTC_INDEX, 7); 438 i = bus_space_read_1(iot, ioh, S3_CRTC_DATA); 439 440 h += (i << 7) & 0x100; 441 h += (i << 3) & 0x200; 442 443 *width = (w+1) << 3; 444 *height = h+1; 445 } 446 447 static void 448 s3_copy(struct fb_dev *fb, int src_x, int src_y, int dest_x, int dest_y, 449 int width, int height, int mask) 450 { 451 bus_space_tag_t iot = fb->fb_iot; 452 bus_space_handle_t ioh = fb->fb_ioh; 453 u_int16_t cmd = S3_CMD_BITBLT | S3_DRAW; 454 455 if (src_x > dest_x) 456 cmd |= S3_INC_X; 457 else { 458 src_x += width-1; 459 dest_x += width-1; 460 } 461 462 if (src_y > dest_y) 463 cmd |= S3_INC_Y; 464 else { 465 src_y += height-1; 466 dest_y += height-1; 467 } 468 469 while (bus_space_read_2(iot, ioh, S3_GP_STAT) & S3_GP_STAT_FIFO_1) 470 ; 471 472 bus_space_write_2(iot, ioh, S3_FRGD_MIX, S3_CSRC_DISPMEM | S3_MIX_NEW); 473 bus_space_write_2(iot, ioh, S3_WRT_MASK, mask); 474 bus_space_write_2(iot, ioh, S3_CUR_X, src_x); 475 bus_space_write_2(iot, ioh, S3_CUR_Y, src_y); 476 bus_space_write_2(iot, ioh, S3_DESTX_DIASTP, dest_x); 477 bus_space_write_2(iot, ioh, S3_DESTY_AXSTP, dest_y); 478 bus_space_write_2(iot, ioh, S3_MULTIFUNC_CNTL, height-1); 479 bus_space_write_2(iot, ioh, S3_MAJ_AXIS_PCNT, width-1); 480 bus_space_write_2(iot, ioh, S3_CMD, cmd); 481 482 while (bus_space_read_2(iot, ioh, S3_GP_STAT) & S3_GP_STAT_BSY) 483 ; 484 } 485 486 static void 487 s3_fill(struct fb_dev *fb, int x, int y, int width, int height, 488 int color, int mask) 489 { 490 bus_space_tag_t iot = fb->fb_iot; 491 bus_space_handle_t ioh = fb->fb_ioh; 492 u_int16_t cmd = S3_CMD_RECT | S3_INC_X | S3_INC_Y | S3_DRAW; 493 494 while (bus_space_read_2(iot, ioh, S3_GP_STAT) & S3_GP_STAT_FIFO_1) 495 ; 496 497 bus_space_write_2(iot, ioh, S3_FRGD_MIX, S3_CSRC_FRGDCOL | S3_MIX_NEW); 498 bus_space_write_2(iot, ioh, S3_FRGD_COLOR, color); 499 bus_space_write_2(iot, ioh, S3_WRT_MASK, mask); 500 bus_space_write_2(iot, ioh, S3_CUR_X, x); 501 bus_space_write_2(iot, ioh, S3_CUR_Y, y); 502 bus_space_write_2(iot, ioh, S3_MULTIFUNC_CNTL, height-1); 503 bus_space_write_2(iot, ioh, S3_MAJ_AXIS_PCNT, width-1); 504 bus_space_write_2(iot, ioh, S3_CMD, cmd); 505 506 while (bus_space_read_2(iot, ioh, S3_GP_STAT) & S3_GP_STAT_BSY) 507 ; 508 } 509